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Only listed residential sprinklers shall be used. Listing may be waived for tanks, pumps, hangers, waterflow detection devices and water-control valves except that water-control valves shall be of the indicating type. Unlisted devices shall be submitted to the fire commissioner for approval.
All systems shall be tested for leakage at normal system operating water pressure. If a fire department pumper connection is provided, tests shall be performed in accordance with Section 15-16-260.
(Prior code § 91-132; Added Coun. J. 12-21-84, p. 12140; Amend Coun. J. 5-18-16, p. 24131, § 139)
The following water supplies complying with Chapter 11-8 are permitted:
(a) Connection to city main with an approved automatically operated pump;
(b) An elevated tank;
(c) A pressure tank installed in accordance with NFPA 13-2013, and NFPA 22-2013;
(d) A stored water source with an approved automatically operated pump.
When stored water is used as the sole source of supply, the minimum quantity shall equal the water demand rates times ten minutes.
(Prior code § 91-133; Added Coun. J. 12-21-84, p. 12140; Amend Coun. J. 9-6-17, p. 55278, Art. VII, § 31)
Each system shall have a control valve, a system drain one-half inch or larger, and a test connection with valve on the system side of the control valve.
A pressure gauge and liquid level indicator shall be installed to indicate air pressure and water quantity in water supply pressure tanks.
Pipe or tube used in sprinkler systems shall be of materials specified in Section 15-16-370 of this Code.
Schedule ten steel pipe may be joined with mechanical groove couplings approved for service with grooves rolled on the pipe by an approved groove- rolling machine for branch lines only.
Fittings used in sprinkler systems shall be of materials specified in NFPA 13-2013.
Fittings shall be supported from structural members in accordance with Section 15-16-380 of this Code. Piping laid on open joist or rafters shall be secured to prevent lateral movement.
Listed residential sprinklers shall be used. The basis of such a listing shall be tests to establish the ability of the sprinklers to control residential fires under standardized fire test conditions. The standardized fire shall be based on a residential array of furnishings and finishes.
The sprinklers shall have fusing temperatures not less than 35 degrees Fahrenheit above maximum expected ambient temperature.
Joints for the connection of copper tubing may be soldered in accordance with ASTM B32-08 (2014), 95-5 or 50-50.
Operated, damaged or painted sprinklers shall be replaced with sprinklers having the same performance characteristics as original equipment.
Local waterflow alarms shall be provided on all sprinkler systems.
(Prior code § 91-134; Added Coun. J. 12-21-84, p. 12140; Amend Coun. J. 9-6-17, p. 55278, Art. VII, § 32)
Application rates, design areas, areas of coverage, positioning, and minimum design pressures shall be in accordance with the listings of the specific residential sprinklers used.
The number of design sprinklers includes all sprinklers within a compartment to a maximum of two sprinklers.
The water demand for the system shall be determined by multiplying the design discharge per manufacturer's listing by the number of design sprinklers.
Sprinklers shall be positioned so that the discharge is not obstructed by beams or light fixtures.
When tests are performed which show that sprinklers are positioned so that discharge is not obstructed, sprinklers shall be installed in accordance with the test results.
Piping shall be sized hydraulically in accordance with the methods described in NFPA 13-2013 and as modified in this section. A sufficient number of calculations shall be made to insure adequate pipe sizing for the various design discharges for which the residential sprinkler is listed.
Minimum size shall be one-inch for copper and steel.
Pressure drop in water meters shall be based on the meter manufacturer's data.
Piping configurations may be looped, gridded, straight run or combinations thereof.
Sprinklers shall be installed in all areas except as follows:
(a) Sprinklers may be omitted from bathrooms not exceeding 55 square feet in area with noncombustible plumbing fixtures.
(b) Sprinklers may be omitted from closets where the least dimension does not exceed three feet and the area does not exceed 24 square feet and the walls and ceiling are surfaced with noncombustible materials.
(c) Sprinklers may be omitted from open attached porches.
(e) Sprinklers may be omitted from attics which are not used or intended for living purposes or storage.
(Prior code § 91-135; Added Coun. J. 12-21-84, p. 12140; Amend Coun. J. 9-6-17, p. 55278, Art. VII, § 33)